fossil oil

例句：

1. 1.Fossil fuels are the main sources of energy for many countries.
   化石燃料是许多国家的主要能源来源。
2. 2. The discovery of new fossil fuel reserves has sparked interest in alternative energy sources.
   新化石燃料储备的发现激发了对替代能源的兴趣。
3. 3.Fossil fuels have a significant impact on the environment and climate change.
   化石燃料对环境及气候变化有显著影响。